It’s well know some characters can go for your sentries at lv 1 on Incursion mode. And yes, you can counter that.
But some times I see a entire closed team going for it with 2 supports and some ranged damage dealer. (I saw already a Montana with Miku and Reyna and in another match a Kleese with Benedict, Ghalt and Thorn).
You can still counter if you have a full team and ranged, because melees are weak at lv 1 (without Miku). So is this intended? It’s a 99% chance of winning against a team of solo players or melees. A Rath can do something about it, but he needs his ultimate and by level 5 you already lost. If you are simple playing the game and trying new characters you can’t beat this.
I like the backdoor strategy and I’m not against it, but I believe it’s needs a nerf for early game. Something like: The first sentry shield is invunerable against players unless there is a minion attacking it. After the first shield is down, backdoor is free and for both team, so now you have a chance to attack back. And with that you have a chance to level up your melees and gears to counter the backdoor and the game became more about holding the lane and the pushing until you can use backdoor.